Mozilla Firefox is a trusted Web Browser and is compatible with most devices. However, the Couldn’t load XPCOM error message pops up now and then. The XPCOM is a cross-platform component model from the Mozilla Firefox, so the Cannot load XPCOM error disrupts the browsing. You may click on the OK button to close the error message, but you may not be able to use the Firefox app. The article addresses the error and the methods to resolve the XPCOM Firefox error are explained here.
How to Fix Mozilla Firefox Couldn’t Load XPCOM Error on Windows 10
The list of causes for which the XPCOM error occurs on Firefox is given in this section.
- Outdated Firefox- The outdated version of the Firefox app may cause this error.
- Corrupt Firefox User Profile- The User Profile on the Firefox Web Browser may be corrupt or may have malware sources.
- Third-party Extensions on Firefox- The issue with the XPCOM may arise if there are third-party extensions installed on the Firefox app.
- Corrupt System Files- The System files installed locally on your PC may have been corrupt or the PC may be infected with a virus.
Cara 1: Metode Ngatasi Masalah Dasar
The first approach to solve the Couldn’t load XPCOM error is to try the basic troubleshooting methods listed in this section.
1. Wiwiti maneh PC
There might be some glitches on your PC that prevent you from using the Firefox browser; you can restart your PC to fix the error. Press the Windows key, click on the Power button at the bottom-left corner, and click on the Baleni meneh pilihan kanggo miwiti maneh PC.
2. Priksa Sambungan Internet
An unstable Internet connection may hinder you from using the Firefox browser. You can check the speed of the connection using the Tes kacepetan and assess its quality.
- If the speed is low, try using any other Wi-Fi network for browsing on Firefox.
- Consider changing the data plan of the Internet Connection to a better plan.
3. Switch to Another Web Browser
If the XPCOM error with the Firefox Web Browser is still not resolved, you can try switching to another Web Browser like Google Chrome. Follow the steps below to switch to a different browser:
1. Bukak Setelan kanthi mencet Tombol Windows + I bebarengan.
2. Klik ing Aplikasi setelan.
3. Klik ing Aplikasi standar ing panel kiwa.
4. Scroll down and click on the current Browser web.
5. Choose from the option as per your preference.
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4. Mbusak File Sementara
The numerous temporary files saved locally on your PC may have disrupted the browsing activity on Firefox. You can read the method to delete the temp files on your PC using the link given here.
5. Repair Corrupt Files
The files on your PC may be corrupt and have some issues which may cause the Couldn’t load XPCOM error. Read the article to repair system files on Windows 10 for corrupt files using the link provided here.
6. Nganyari Windows
In most instances, using an outdated OS may cause issues on the PC; you need to update the Windows on your PC to the latest version to fix this error. Read the article on how to update Windows on your PC using the link given here.
7. Mbukak Troubleshooter Update Windows
The issues with the Firefox browser can be cleared by using the Windows Troubleshooter on your PC. Read the method to run the Windows Troubleshooter using the link here and fix the error.
8. Disable Antivirus Temporarily (If Applicable)
The third-party security services on your PC may disrupt you from using the Firefox app; you can disable the anti-virus program to fix this error. Implement the steps given in the link here to disable the Anti-virus software on your PC.
9. Nindakake System Restore
If the Firefox app performed better on the previous version of the Windows PC, you can try performing a System Restore on your PC to fix the error. The link which is given here will provide you with the method to perform a System Restore on your PC.
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Method 2: Run Firefox as Administrator
The Couldn’t load XPCOM error might appear if the Firefox is not granted the administrative permissions on your PC. You have to run the Firefox app as an Administrator on your Pc to fix the error.
1. Pencet Tombol Windows, ketik Firefox lan klik ing Run minangka administrator pilihan.
Method 3: Update Firefox Browser
Using an outdated version of the Firefox Web Browser can be a reason for this error. Follow the steps below to update the Firefox app on your PC.
1. Tekan ing Tombol Windows, ketik Firefox Lan klik ing Open.
2. Klik ing Open Application Menu button (indicated by the three horizontal lines) at the top-right corner of the home page and click on the Setelan option on the list displayed.
3. Ing Umum tab, klik ing Priksa pembaruan tombol ing Nganyari Firefox bagean.
4. Sampeyan bakal weruh ing Firefox is up to date message on the Firefox Updates section.
Catetan: If there is an update for the Firefox browser, you will be prompted accordingly.
Method 4: Refresh Firefox Browser
To fix the Couldn’t load XPCOM error on the Firefox app, you can refresh Firefox entirely.
1. Bukak Firefox aplikasi saka Windows Search bar.
2. Sabanjure, klik ing Open Application Menu tombol banjur klik ing bantuan option on the list displayed.
3. Klik ing Troubleshoot Mode… ing Firefox help jendhela.
4. Saiki, klik ing Baleni meneh tombol ing Wiwiti maneh Firefox ing Mode Troubleshoot jendhela pop-up.
5. Klik ing Refresh Firefox tombol ing Open Firefox in Troubleshoot Mode confirmation window.
6. Banjur, klik ing Refresh Firefox tombol ing Refresh Firefox to its default settings jendhela.
7. Pungkasan, klik ing Rampung tombol ing Import Complete window to Refresh Firefox completely.
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Method 5: Disable Firefox Extensions
The extensions on the Firefox Web Browser can be a reason for the Couldn’t load XPCOM error. You can disable the extensions on the browser to fix the error.
1. Bukak Mozilla Firefox aplikasi saka Windows Search bar.
2. Klik ing Open Application Menu tombol banjur klik ing bantuan option on the list displayed.
3. Saiki, klik ing Troubleshoot Mode… ing Firefox help jendhela.
4. Klik ing Open tombol ing Wiwiti maneh Firefox ing Mode Troubleshoot jendhela pop-up.
5. Sabanjure, klik ing Open Application Menu tombol banjur klik ing Add-ons lan tema option on the list.
6. Klik ing Ekstensi tab on the left pane of the next window and toggle mati the add-ons on the window.
7. Banjur, klik ing telung titik horisontal button on the add-on and click on the mbusak button on the list.
8. Klik ing mbusak button on the confirmation pop-up message window.
Method 6: Create New Firefox Profile
The current User Profile on the Firefox web browser may be corrupt; you can create a new User Profile to fix the Couldn’t load XPCOM error.
Step I: Import Saved Bookmarks
As a first step, you need to import the Bookmarks you have saved on the current User Profile to avoid any loss of data.
1. Bukak Mozilla Firefox app.
2. Klik ing Open Application Menu tombol banjur klik ing tetenger option in the list displayed.
3. Ing tetenger menu, klik ing Ngatur tetenger option at the bottom of the list.
4. Ing Pustaka layar, klik ing Import and Backup button at the menu bar and click on the Export Bookmarks to HTML… option in the drop-down menu displayed.
5. Ing Export Bookmarks File window, browse and select a location, and click on the Simpen button to save the bookmarks file.
Step II: Create New User Profile
This section will introduce the method to create a new User Profile on the Firefox app to fix the Couldn’t load XPCOM error.
1. Bukak Firefox aplikasi browser.
2. Ketik babagan: profil in the URL address bar at the top and press the Ketik tombol kanggo mbukak About Profiles jendhela.
3. Klik ing Gawe Profil Anyar tombol ing jendhela.
4. Sabanjure, klik ing Sabanjure tombol ing Welcome to the Create Profile Wizard.
5. Type a name for the Profile in the Ketik jeneng profil anyar lapangan lan klik ing Rampung button in the window to create the Profile.
Catetan: Klik ing Choose Folder… button to change the location for storing the User Profile name instead of the default location.
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Method 7: Reinstall Firefox
The Firefox app installed on your PC might be corrupt or not properly installed. You can reinstall Firefox on your PC to fix the Couldn’t load XPCOM error.
Step I: Uninstall Firefox
The first step is to uninstall the existing version of the Firefox web browser on your PC using the Control Panel.
1. Pencet Tombol Windows, ketik panel kontrol Lan klik ing Open.
2. Click on the option Kategori ing Deleng dening drop-down menu and click on the Mbusak instal program pilihan ing program judhul.
3. Pilih Mozilla Firefox (x64 en-US) in the list, click on the Nyopot button at the top of the bar and click on the Ya tombol ing jendhela UAC.
4. Banjur, klik ing Sabanjure tombol ing Mozilla Firefox Uninstall tuntunan.
5. Sabanjure, klik ing Nyopot button in the next window.
6. Klik ing Rampung button on the last window to completely uninstall the Firefox app.
7. Pencet Windows + E tombol together to open the File Explorer and navigate to the This PC > Local Disk (C:) > Program Files > Mozilla Firefox folder.
8. Klik-tengen ing Mozilla Firefox folder lan klik ing Busak option on the list to delete the files.
Step II: Reinstall Firefox
The next step to fix the Couldn’t load XPCOM error is to reinstall the Firefox Web Browser on your PC.
1. Tekan ing Tombol Windows, ketik google kromo Lan klik ing Open.
Catetan: You can use any web browser to download the Firefox browser on your PC.
2. Bukak situs web resmi saka Browser Mozilla Firefox on Google Chrome and click on the Ngundhuh Firefox tombol ing jendhela.
3. Double-click on the downloaded executable file Firefox Installer.exe to run the installation file.
4. Wait for the installation process to complete.
5. Bukak Firefox Web Browser app on your PC.
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Method 8: Modify Tor Web Browser Settings
If you are using the Tor Web browser, in addition to Firefox, the issues on the Tor browser may cause the Couldn’t load XPCOM error. To fix this error, you can try checking for the issues on the Tor browser using Firefox to fix the error.
1. Bukak Firefox app.
2. Klik ing Open Application Menu tombol banjur klik ing Setelan option on the list displayed.
3. Ing Umum tab, klik ing Setelan… tombol ing Setelan Jaringan bagean.
4. Pilih Manual proxy configuration pilihan ing Setelan Koneksi jendhela.
5. Ketik SOCKS Host: 127.0.0.1 Port: 9050 ing Http proxy lapangan, jinis 8080 ing Port field, and click on the OK tombol.
6. Banjur, ketik Babagan: config on the search bar of the Firefox browser and click on the Nampa Risiko lan Terusake tombol.
7. Finally, type network.proxy.socks_remote_dns ing garis telusuran banjur klik ing togol button to set the type of the entry to be bener.
8. Saiki, ketik https://check.torptoject.org/ in the search bar on the Firefox browser and press the Ketik key to check the issues with the Tor Browser.
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The article discusses the methods to fix couldn’t load XPCOM Firefox error on Windows 10 PC. Try implementing the methods discussed in the article to fix the error and please leave your suggestions on the same in the comments section. If you have any queries on the Cannot load XPCOM error, post them in the comments.